Automatic hydraulic casing-jack.



R. W. GRAHAM.

AUTOMATIC HYDRAULIC CASING JACK.

APPLICATION FILED JULY 19,1913.

Patented July 21, 1914.

2 SHBETSSHEET 1.

1N VENTOR WITNESSES:

R. W. GRAHAM.

AUTOMATIC HYDRAULIC CASING JACK.

APPLIGATION FILED JULY 19,1913.

Patented July 21, 1914.

2 SHEETS-SHEET 2.

//z E Y a {17 Mm W6 W m a 10 PM WITNESSES:

wax/p2 s'rATEs PAT- OFFICE- 310mm w. em, 01- BERKELEY, cmrohivm.

An'romvrre nYfimhueehsme-mm p i To all whom it concern I e v Beit known that I, Rmhhm *WJGRAHA'M; a citizendf the United States, residing-lit Berkeley, in the county of Alameda and 'h State of California, have inventefl mew ma specification.

useful Itiprovhhziits in 'Adtenitltic Hfytlrti'ulie Casing-il'acks,'df whiehthe fblldwiiig isa This inventio'h relates -to en hiitolnatlc, hydrauliwjack for Oil well chsing's.

The object of the invention is to provide a simple, suht'a'ntitil, prhdtietil casin 'jak' which is socdnstrn'cted thhtit will dhtdm'at' ically raise and 'ldwe'r the well 'e'fisin'g while drilling dperation's drsimilar 'wdrk is 'takihg plhce, thus 'preventihg the casing from freezing by kee ing it moving cdiitlh'i1 dusl'y. c T

The 'invefltion consists "(if the jjarts and the cdnstruetidn -ahd -cdhibih'atidh df "parts;

as hereinafter "mere 'fiilly described a'nd' claimed, having reference tb the l'ccomp'a-nfiyinfi flrawihgs in which,- Q igzire 1 is a sitle elevation d 'the-jiick partly in section. Fig. '2 is a side elevation showing the positie'n (if *the valve b'perating mechanism. F '8 fish 's'ideeleva'tio'n partly I in setidn, showi'flg the lipplic'h'tidnflf the inveiition. 1 In drilling flee'p 'oil Wells er the like it is found that 'the pit-sing in lin'iflg the well'dften becomes *frozen or stuck within the well by cavings or foreign material heco'l'nin'g lodged ag'ltirit the casing. I *Sometimes the etisifig sticks when fishing 'fdi' 'lo'st. tools. .Ifi 'drder to 'fiee thecasmg M d keep it loose where' it is-desired 'fOcOfiti'nUe low eringdrtq remove the'easing, it is necessary, under ordinary werki'tig conditidfis where my invention 'isnot used, to istdp; dfiil'l'iflg operations and remove the tdols frdm thewell, a'fter which it is required to use catsin% blocks to, lift the casing, in 'older 'to free: it efdre thetedls may again be reputed ahd drilliflg Tesumed. It is also'heces's'terfy to em ploy additional men to operate {the 'orcl'i'niiry casing jack now in use, in drde'r to'keep suflicient {pressure on the jack-to prodhcemafivide a h driiulieeasihg jack which will hutomatice =13 mike a'n'd- 'lewer the casing at certain timed intervals while -clrilling 'or similar operations are taking place 'thfough Specification 6f Iiettefsiatnlt. {Patented July 2 1, I914, pucaummem ly 19, fem. sorrel m'mhisa. I

' the casing, thus elinilnttting the loss oftim'e usuhlly necessitdted by the removal Of the 7 tools from the well in order to the-easing loose.

Referring to the drawings: A 'inilictites 'a'n tipen-nded eylinder in which is recipreehlly mounted a plunger 2, having a cenlift or jar ltrtil openifig 3,'-tliro1'igh which the well cas- 'ihg, 'ifidicetedh't '4,is-' ada'pt'ed to extend. The {lowerend of the plunger is provided with a tubular exteneiqn 5, rovided for the purpose of guidihgthe-chsi g and plunger, and is packed against 'letikalge, its "at 6, in the lower end ofthe'c'ylindr, and as at 7 in the upper-end.

, 'For t'h'e purpose (if ailtometically admitting liquid tinder pressure to the cylinder to lift the plunger and to release shine to llower the plfingr'ait certain timed intervals, {the following valve Operating mechanism has Fb'ee'n provided: 8 and 9 infiicate-inlet amil outlet valves (iftinysdlwbledesign pro- 'vided for the plllpOS'e'df cdhtrolling the flow 7 ed? liquih to end from the cylinder. Suitably nidunted 'updn the stems of the valves ale levers -10-'a'nd 11-, the 'infie'r'eri'ds of which fare slott fl; 'a's indicated it '12, for the puripose of forming esliding connection be- -'-'tween the levers dud a pair of rods '13 and 14, slil1ab1'yh1ounted 'in hearihgs 15'and =16, 'u'pdn fthe'outsid'e'of the-cylinder;

Suitably secured upon the iods 13 and '14 i are two pair of stops 15 16' and 15-16 ga'nd-slielabljr mounted between "the rods is a bhfr 17, 'up'on the lower end of which is mounted e lprojecting' Fug '18. The upper 'ehd elf the bin -'I7 is secured. to a plate 19, suitably secured, as at 20, in 3,?g1'd0V6 formed *o'n the outer surf'aee'of the upper "end (if the lmfger. Movementafthe plfing'erin either -'dire'ctieh will thus be transmitted "thlbu h plunger and connected bin 17 "being trims-- minted thrdugh the'lug 1s h stops 15 and 1'6 moves the rods 13 end '14:, with connectefl 'evers 10 anel 1Z1, a, position where the inlet valve 8 will he 6 ened While the outlet val've '9 'will 'be "close Flilid under pressure from any sm table sdurce may thus he admitted to the cylinder to lift the plunger in an upward direction, the speed or up- J I ward movement of the plun er being limited by the amount of liquid a mitted tlirough the valve 8, this having previously been ad justed to the required speed.

The upward movement of'the plunger will similarly cause the lug 18 eventually to engage with the upper adjustable stops 15* -16 and lift the rods 13 and 14, with connected levers 10- and 11, into position Where the inlet valve 8 will be closed while cated at B, is lowered over the upper end of the casing into position where it will rest upon the surface timbers, indicated at C.

. A spider of any suitable description, indi cated at D, is then' slipped over the casing and lowered into position where it will rest upon top of the plunger head, as indicated in Figs. 1 and 3. The inlet valveS is then connected with the pressure pump, or any suitable source of pressure, not here indicated, and liquid admitted to the cylinder. Upward movement of the plunger 2, caused by the admission of fluid under pressure to the cylinder, will immediately cause the slips 21 within the spider to grip the easing, thus causing thecasing to be lifted in unison with the plunger. The plunger, spider and casing supported by same, will thus move upwardly in unison until the lug 18 engages with-the upper adjustable stops 15-16 which will immediately reverse the ,movement of the plunger by closing the inletvalve and correspondingly openin the outlet valve. The plunger, spider an cas ing supportedthere are thus permitted to settle until the movement of the plun er is again reversed and the cycle of operation repeated. The speed of the plunger may be regulated b the opening of the valves 8 and 9 and t e exact-lift of same may be adjusted 'by raising or lowering of the stops 15-16" and 15"--16}: uponthe rods '13 and 14. Drilling operations may thus be continued' without interru tion while the casing is being continuous y lifted and lowered within the Well bore or fishing o erations' for lost tools may take place wit out any danger of freezing the casing while such operations are taking lace.

By employin a jac constructed as hereshown, (practice, ly 50% more work can be obtaine the'old method of drilling where the operation of lifting the casi'n and drilling were intermittent. The jack liere shown is neat, simple and compact in construction, prompt andautomatic in action, and takes less space from the drill when compared with than similar jacks heretofore employed. The materials and finish of the several parts are such as experience'and judgment of they manufacturer may dictate.

a suitable form of pressure gage, indicated at 25, has been provided. The gage may be direct connected with the jack or may be mounted on the pressure line in any convenient position, where it can always be observed by the operator. The operator can thus prevent any accidental parting of the casing by simply reducing the pressure before it reaches the danger mark.

Having thus described my invention, what I claim-and desire to secure by LettersPatent, is: 2

1. A hydraulic casing jack comprising combination, an open-ended cylinder, a

plunger mounted in said cylinder having a central openin extending therethrough to permit it to slip over; a casin and means connected with the cylinder or admitting fluid under pressure to lift the plunger. 96

2. A hydraulic casing jack comprising in combination, an open-ended cylinder, a plunger mounted in said cylinder having a central opening extending therethrough to [permit it to slip over a casing, exhaust and 5 inlet pipes connected with the cylinder,

valves on said pipes, and means for automatically opening and closing said valves to intermittently admit and release fluid to raise and lower the plunger.

3. A hydraulic casing 1ack comprising in combination, an open-ended cylinder, a

plunger mountedin said cylinder Having .a

central opening extending therethrough to permit it to slip over a casing, exhaust and inlet pipes connected with the cylinder, valves on said pipes, and means connected with the plunger for opening and closing said valves 'to intermittently admit and release fluid to raise and lower the plunger.

4. A- hydraulic casing jack comprising in combination, an open-ended cylinder, 9. plunger mounted in said cylinder. having a central opening extending therethrough to permit it to slip over a casing, and means 115 connected with the cylinder for intermittentl admitting and releasing fluid to raise and ower the lunger.

5. A hydra 'c casing jack comprising in combinatlon, an open-ended cylinder, a plunger mounted in said cylinder having a central opening extending therethrough to permit it to slip over a casing, and means for rghci rocating the plunger.

6. combination, an open-ended cy inder, a plunger mounted in said cylinder having a central opening extending therethrough to permit it to slip over a casing, valves connected with the cylinder for admitting and ydraulic casing jack com rising in 1:35

For the purpose of preventin the casing from beingstrained or parted y the jack,

releasing fluid to raise and lower the plunger, a pair of rods slidably mounted on the cylinder, levers mounted 0n.the valves connected with said rods, means operated by the plunger for liftin said rods, and means on said rods for ad]usting the lift of the plunger.

7. A hydraulic casing jack comprising in combination, an open-ended cylinder, a plunger mounted in said cylinder having a central opening extending therethrough to permit it to slip over a casing, valves connected with the cylinder for admitting and releasing fluid to raise and lower the pluna pair of rods slidably mounted on the ger,

levers mounted on the valves concylinder, nected with said rods, stops adjustably mountedon the rods, a bar secured to the plunger slida bly mounted with relation to said rods, and a lug on the bar adapted to engage with the stops on the rods.

8. A casing jack comprising a cylinder, a

hollow piston adapted to fit over a casing, .said casingand piston inclosing an annular piston chamber, fluid connections with the cylinder, and means operated by the piston for controlling the inlet and outlet of fluid from the cylinder to actuate the piston.

In testimony whereof I have hereunto set my hand in the presence of two subsorib- 30 I ing witnesses.

RIC

W, .GRAHAM'.

Witnesses:

W. W. HEALEY, Jon HABBISON. 

